Upgrade View 5.1.2 to Horizon 7

We are planning on doing an upgrade from View 5.1.2 to Horizon 7 and I'm just trying to nail down the process.

I found another thread where it is mentioned to remove any VMWare signed certificates from the View 5.1 environment before upgrading. Is there a way I can check what certs View is currently using? I'm 90% sure they aren't self signed but as I didn't setup the environment I'm not 100% sure.
We are definitely utilising the VMware certificates for Vcentre, is that of concern or OK to keep as is? Based on the upgrade guide it appears to be accepted.

Finally, is there anyone who has done this upgrade that can offer any advice on things they found during the process (or things to look out for)?

I can see that Composer (installed alongside my Vcentre) is using a self signed certificate generated by the composer installation. I found this by checking the registry keys for the SSL binding (HKLM\SYSTEM\ControlSet001\Services\HTTP\Paramaters\SSLbindings) and found the cert thumbprint. Correlated that back to the self signed certificate in cert manager.

The connection server is running a 3rd party certificate and our security server is also running a 3rd party cert.

I am busy setting up a second environment running 5.1.2 to mimic what we have in production and running an update to Horizon 7 to see what happens.

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